Home / 20,871.19-28,840.43-15,196.09

Finding the Fourth Proportional to 20,871.19, 28,840.43 and 15,196.09

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Solution

The fourth proportional to 20,871.19, 28,840.43 and 15,196.09 is: 20,998.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.19 : 28,840.43 = 15,196.09 : x
  2. Step 2: Convert to fraction form
    20,871.19/28,840.43 = 15,196.09/x
  3. Step 3: Cross multiply
    20,871.19x = 28,840.43 × 15,196.09
  4. Step 4: Simplify right side
    20,871.19x = 438,261,625.72
  5. Step 5: Solve for x
    x = 438,261,625.72/20,871.19
  6. Step 6: Final answer
    x = 20,998.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.